Playing field obstacle



FIG. 1 is a front elevational view of a playing field obstacle showingmy design;

FIG. 2 is a rear elevational view of the playing field obstacle of FIG.1; and,

FIG. 3 is a right elevational side view of the playing field obstacle ofFIG. 1; the left elevational side view thereof being a mirror image ofthat which is shown.

The broken lines are included for the purpose of illustrating portionsof the playing field obstacle that form no part of the claimed design.

The ornamental design for a playing field obstacle, as shown anddescribed.